Noel Chiappa wrote: I believe you are entirely correct, except it was AI rather than MC. As I'm sure you know, AI had the Rubin 10-11 interface with eight Unibuses for attaching processors through shared memory. MC had the DTE20 and DL10, but those were for PDP-11 front ends. The Chess Machine CHEOPS was used with MacHack VI running on MC, but communicating over Chaosnet. At least, that's how I interpret the code in MacHack. This doesn't make me less interested in emulating both CONS and CHEOPS. Time permitting - which it doesn't. I don't see any technical obstacles; we already have one of the 10-11 processors working. I have reviewed the amount of preserved software, and I think chances are good microcode and microassemblers for CONS and CHEOPS still exist. There is some debate over whether the CONS had a display of its own, and if so whether it could draw to a bitmap. Do you remember? As a mid-70s technology, it might be a contender for one of the early GUIs this thread is about. I have talked to Lispm enthusiasts, and they have a hard time pinpointing a birthdate for the CADR. Do you have a recollection when, even what year, the first boot attempt was? My information says room 907 at various points in time housed CADR-1, "Chess, Lisp machines", Lisp Machine Consoles, GT40 (Lisp machine).